CN103407916B - A kind of cushioning device for luffing cylinder and crane - Google Patents
A kind of cushioning device for luffing cylinder and crane Download PDFInfo
- Publication number
- CN103407916B CN103407916B CN201310393849.5A CN201310393849A CN103407916B CN 103407916 B CN103407916 B CN 103407916B CN 201310393849 A CN201310393849 A CN 201310393849A CN 103407916 B CN103407916 B CN 103407916B
- Authority
- CN
- China
- Prior art keywords
- oil
- directional control
- control valve
- solenoid directional
- oil cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Jib Cranes (AREA)
Abstract
The present invention relates to a kind of cushioning device for luffing cylinder and crane, buffer unit includes the first solenoid directional control valve and accumulator, the oil-in of the first solenoid directional control valve is connected with the rodless cavity of amplitude oil cylinder, the oil-out of the first solenoid directional control valve is connected with accumulator, when being under hoisting operation pattern, the first solenoid directional control valve of buffer unit is in zero-bit thus is cut off by fluid in the rodless cavity with amplitude oil cylinder of the fluid in accumulator；When being under traveling work pattern, the first solenoid directional control valve of buffer unit commutates thus is connected with fluid in the rodless cavity of amplitude oil cylinder by fluid in accumulator, and accumulator starts oil-filling until reaching to reach balance with amplitude oil cylinder oil liquid pressure.The car load that the cushioning device for luffing cylinder that the present invention provides causes for buffering arm to swing swings impact, it is possible to effectively alleviates rough terrain wheeled crane arm and swings the car load shake caused, it is possible to is operated in crane hoisting operation and travels under operation both of which.
Description
Technical field
The present invention relates to engineering machinery field, be specifically related to a kind of cushioning device for luffing cylinder and bag
Crane containing this cushioning device for luffing cylinder.
Background technology
Rough terrain wheeled crane is the swing arm revolving crane utilizing rubber-tyred chassis to walk, lifting
Mechanism is arranged on the Full Rotary lifting of one on the special chassis of scale-up version tire and wheel shaft composition
Machine.Hydraulic pump is energy conversion component main in hydraulic system, converts mechanical energy into hydraulic energy,
Therefore the input parameter of hydraulic pump be mechanical parameter, output parameter be hydraulic pressure parameter.Hydraulic jack is
Hydraulic energy is converted to mechanical energy by hydraulic means, it is achieved straight reciprocating motion or swing move back and forth
Executive component.Rodless cavity is the oil pocket that hydraulic jack does not has piston rod, is called the most again big chamber.
Rod chamber is the oil pocket that hydraulic jack has piston rod, is called the most again loculus.Accumulator is to utilize power
Equilibrium principle, make the volume of hydraulic fluid (oily) change, thus reach storage and release
A kind of device of hydraulic energy.Choke valve be in hydraulic pressure or pneumatic system arrange can regulate little
Hole, it is possible to control the flow of fluid.Solenoid directional control valve is to promote spool with electric magnet, thus converts
The control valve of fluid flow direction.
As it is shown in figure 1, the changing-breadth system of a kind of rough terrain wheeled crane includes amplitude oil cylinder 2, hangs
Arm 1 and turntable 3, amplitude oil cylinder 2, arm 1, turntable 3 two-by-two connect formation triangular structure,
Arm 1 and turntable 3 are connected by the first twisted point 4, and amplitude oil cylinder 2 and turntable 3 are by the second strand
Point 5 connection, amplitude oil cylinder 2 and arm 1 are connected by the 3rd twisted point 6, for relative turntable 3,
First twisted point 4 and the second twisted point 5 are fixing, when amplitude oil cylinder 2 is stretched, and triangular structure
Change, the 3rd twisted point 6 relative movement.
As in figure 2 it is shown, the arm 1 of autocrane respectively with amplitude oil cylinder 2, suspension arm support 7
Connecting, arm 1 is pressed in suspension arm support 7 in motion, constitutes an entirety with car load, additionally
Autocrane car load is longer, and it is less that arm stretches out cabin length, does not haves as off-the-highway tire
Crane arm overhang is relatively big, the reach of arm center of gravity causes in driving process and impacts car load
Phenomenon.
By the position of the effect change arm of amplitude oil cylinder on wheeled crane, increase working range.
Rough terrain wheeled crane cannot use suspension arm support, after arm due to reasons such as structure, use conditions
Twisted point is hinged with turntable, and before arm, twisted point supports by amplitude oil cylinder.Arm during cross-country run
Have a certain degree of swinging up and down.The method of tradition vibration damping is that driver's cabin uses Rubber spring suspension,
Driver seat uses resilient suspension, but these measures are only effective to isolation dither, and to car
Body significantly rock back and forth vibration invalid.Alleviate arm swing currently without effective measures to cause
Impact.
The rough terrain wheeled crane changing-breadth system of prior art has the disadvantages that
1, without buffer unit: at present without special buffer unit in rough terrain wheeled crane changing-breadth system
Buffer arm in driving process and swing the impact caused.
2, comfortableness is poor: driver can feel that seat is pitching, for a long time in the process of moving
Traveling easily causes physical fatigue.
Summary of the invention
The purpose of the present invention is to propose to a kind of cushioning device for luffing cylinder and comprise this amplitude oil cylinder
The crane of buffer unit, this cushioning device for luffing cylinder efficiently solves the problems referred to above, structure
Simply, easy to operate.
For achieving the above object, the invention provides techniques below scheme:
A kind of cushioning device for luffing cylinder, buffer unit includes the first solenoid directional control valve and accumulator,
The oil-in of the first solenoid directional control valve is connected with the rodless cavity of amplitude oil cylinder, the first solenoid directional control valve
Oil-out is connected with accumulator, when being under hoisting operation pattern, and the first electromagnetism of buffer unit
Reversal valve is in zero-bit thus is cut off by fluid in the rodless cavity with amplitude oil cylinder of the fluid in accumulator,
Pass through without fluid between accumulator and the rodless cavity of amplitude oil cylinder；When being under traveling work pattern,
First solenoid directional control valve commutation of buffer unit thus by fluid in accumulator and amplitude oil cylinder without bar
Fluid connection in chamber, accumulator starts oil-filling until reaching to reach flat with amplitude oil cylinder oil liquid pressure
Weighing apparatus.
In one preferably or alternatively embodiment, buffer unit also includes choke valve, the first electromagnetism
Oil-out and the accumulator of reversal valve are connected by choke valve.
In one preferably or alternatively embodiment, buffer unit uses board-like connection, by the first electricity
Magnetic reversal valve, choke valve and accumulator are integrated on a valve block.
In one preferably or alternatively embodiment, the first solenoid directional control valve uses 2/2-way without letting out
Leakage solenoid directional control valve.
Present invention also offers techniques below scheme:
A kind of crane, crane include fuel tank, oil pump, the second solenoid directional control valve, balanced valve,
Amplitude oil cylinder, arm, turntable and cushioning device for luffing cylinder as above, the oil-in of oil pump
Connecting with fuel tank, the oil-out of oil pump and the oil-in of the second solenoid directional control valve connect, the second electromagnetism
The oil-in of the actuator port of reversal valve and balanced valve connects, the oil return opening of the second solenoid directional control valve and
Fuel tank connects, and two oil-outs of balanced valve connect with the rodless cavity of amplitude oil cylinder and rod chamber respectively,
The oil-in of the first solenoid directional control valve of buffer unit is connected with the rodless cavity of amplitude oil cylinder, luffing oil
Cylinder, arm, turntable connect formation triangular structure two-by-two, are hung by the flexible change of amplitude oil cylinder
The position of arm.
In one preferably or alternatively embodiment, crane also includes overflow valve, overflow valve and oil
Parallel connection of pumps is arranged.
In one preferably or alternatively embodiment, crane is rough terrain wheeled crane.
Based on the arbitrary technical scheme in technique scheme, the embodiment of the present invention at least can be produced
Raw following technique effect:
Due to cushioning device for luffing cylinder provided by the present invention, including the first solenoid directional control valve and storage
Energy device, the oil-in of the first solenoid directional control valve is connected with the rodless cavity of amplitude oil cylinder, and the first electromagnetism changes
It is connected with accumulator to the oil-out of valve, on the basis of rough terrain wheeled crane changing-breadth system principle,
Increase the car load swing impact that this buffer unit causes for buffering arm to swing, it is possible to effectively alleviate
Rough terrain wheeled crane arm swings the car load shake caused, it is possible to be operated in crane hoisting operation
With travel under operation both of which.
In addition, the preferred technical solution of the present invention at least there is also advantages below:
1, this buffer unit can switch under two kinds of mode of operations of rough terrain wheeled crane: i.e. lifting
Work pattern and traveling work pattern, and by using 2/2-way No leakage solenoid directional control valve,
The switching of both of which is more thorough.When being under hoisting operation pattern, accumulator and luffing oil
Pass through without fluid between the rodless cavity of cylinder；When being under traveling work pattern, the of buffer unit
One solenoid directional control valve commutates thus is connected by fluid in the rodless cavity with amplitude oil cylinder of the fluid in accumulator
Logical, accumulator starts oil-filling until reaching to reach balance with amplitude oil cylinder oil liquid pressure.
2, driver comfort strengthens: choke valve makes accumulator stable absorption major part swing due to arm
The impact brought, only fraction impact is delivered to vehicle frame, thus significantly reduce when travelling due to
Arm swings the car load caused and rocks.
3, this buffer unit uses board-like connection, is integrated in by buffer unit on a valve block and luffing
Oil cylinder links together, and so reduces pipeline and uses, increases safety, relatively reliable.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the application
A part, the schematic description and description of the present invention is used for explaining the present invention, not structure
Become inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the rough terrain wheeled crane car load schematic diagram of prior art；
Fig. 2 is the autocrane car load schematic diagram of prior art；
Fig. 3 is the schematic diagram of the preferred embodiment of the cushioning device for luffing cylinder of the present invention；
Fig. 4 is the cushioning device for luffing cylinder view under the hoisting operation pattern of the present invention；
Fig. 5 is the cushioning device for luffing cylinder view travelled under work pattern of the present invention.
Detailed description of the invention
Below by drawings and Examples, technical scheme is done and further retouches in detail
State.
It should be understood that any technical characteristic, any technical scheme in the present embodiment are all
One or more in the technical characteristic of plurality of optional or optional technical scheme, in order to describe letter
Clean need in presents cannot all alternative technical characteristic of the exhaustive present invention and can replacing
The technical scheme in generation, the embodiment being also not easy to each technical characteristic all emphasizes that it is optional
One of numerous embodiments, so those skilled in the art should know: appointing in the present embodiment
What technical characteristic and any technical scheme are all not intended to protection scope of the present invention, the present invention's
It is thinkable any that protection domain should include that those skilled in the art do not pay creative work institute
Alternate embodiments.
Hereafter in order to describe conveniently, hereinafter alleged "left", "right", " on ", D score is with attached
Left and right, the upper and lower of figure itself is to unanimously.
As it is shown on figure 3, a kind of cushioning device for luffing cylinder 11, buffer unit 11 includes the first electricity
Magnetic reversal valve 12, choke valve 15 and accumulator 13, the oil-in of the first solenoid directional control valve 12 and change
The rodless cavity of width oil cylinder 14 connects, and oil-out and the accumulator 13 of the first solenoid directional control valve 12 pass through
Choke valve 15 connects, when being under hoisting operation pattern (electric magnet must not be electric), and buffer unit
The first solenoid directional control valve be in zero-bit thus by the rodless cavity of fluid in accumulator and amplitude oil cylinder
Fluid cuts off, and passes through without fluid between accumulator and the rodless cavity of amplitude oil cylinder；Make when being in traveling
Under industry pattern time (electric magnet obtains electric), the first solenoid directional control valve of buffer unit commutates thus will store
In energy device, fluid connects with fluid in the rodless cavity of amplitude oil cylinder, and accumulator starts oil-filling until reaching
Balance is reached to amplitude oil cylinder oil liquid pressure.
The effect of choke valve is by changing orifice size or chock length to control fluid flow,
Purpose makes accumulator stable absorption major part bring owing to arm swings under travelling work pattern
Impact, only fraction impact is delivered to vehicle frame, thus significantly reduces when travelling owing to arm is put
The dynamic car load caused rocks.
The effect of accumulator is absorption system pulsation, relaxes hydraulic shock, it is therefore an objective to travelling operation
Make buffering course steady under pattern, and in buffering course, store energy.
Buffer unit 11 uses board-like connection, by the first solenoid directional control valve 12, choke valve 15 and storage
Energy device 13 is integrated on a valve block and links together with amplitude oil cylinder 14.
First solenoid directional control valve, choke valve and accumulator are integrated on a valve block and refer to the first electromagnetism
Reversal valve, choke valve and accumulator integrated installation, on a new valve block, are integrally formed with valve block,
Do not introduced fuel-displaced by pipeline.The oil circuit being arranged between the valve on valve block and valve is by valve block
Runner circulates, thus reduces connecting line.Having installed surface on oil cylinder, valve block is entirely through installation
Screw is arranged on oil cylinder installed surface, reduce hydralic hose use, reduce the fault point safer can
Lean on.
First solenoid directional control valve 12 uses 2/2-way No leakage solenoid directional control valve.
As shown in Figure 4,5, a kind of crane, crane includes fuel tank 20, oil pump 16, second
Solenoid directional control valve 17, balanced valve 18, amplitude oil cylinder 14, arm, turntable and amplitude oil cylinder as above
Buffer unit 11, oil-in and the fuel tank 20 of oil pump 16 connect, the oil-out of oil pump 16 and second
The oil-in of solenoid directional control valve 17 connects, the actuator port of the second solenoid directional control valve 17 and balanced valve
The oil-in of 18 connects, and oil return opening and the fuel tank 20 of the second solenoid directional control valve 17 connect, balanced valve
Two oil-outs of 18 connect with the rodless cavity of amplitude oil cylinder 14 and rod chamber respectively, buffer unit 11
The oil-in of the first solenoid directional control valve 12 be connected with the rodless cavity of amplitude oil cylinder 14, amplitude oil cylinder
The rod chamber of 14 also connects with fuel tank 20, and amplitude oil cylinder, arm, turntable connect formation triangle two-by-two
Shape structure, by the position of the flexible change arm of amplitude oil cylinder.
As shown in Figure 4, when (electric magnet must not be electric) under crane is in hoisting operation pattern,
First solenoid directional control valve 12 of buffer unit 11 is in zero-bit thus by fluid and change in accumulator 13
In the rodless cavity of width oil cylinder 14, fluid cuts off, between the rodless cavity of accumulator 13 and amplitude oil cylinder 14
Pass through without fluid.
As it is shown in figure 5, when (electric magnet obtains electric) under crane is in traveling work pattern, slow
First solenoid directional control valve 12 of flushing device 11 commutates thus by fluid and amplitude oil cylinder in accumulator 13
Fluid connection in the rodless cavity of 14, accumulator 13 starts oil-filling until reaching and amplitude oil cylinder 14
Oil liquid pressure reaches balance.When crane running, arm swings to impact and is transferred to amplitude oil cylinder
Time upper, accumulator can absorb major part impact, thus alleviate car load and rock.
Crane is rough terrain wheeled crane.
The other parts of crane are referred to prior art, the most reinflated description of the present invention.
Arbitrary technical scheme disclosed in the invention described above unless otherwise stated, if it discloses
Numerical range, then disclosed numerical range is preferred numerical range, any this area
Skilled artisans appreciated that: preferably numerical range is only technology in many enforceable numerical value
The numerical value that effectiveness comparison is obvious or representative.Owing to numerical value is more, it is impossible to exhaustive, so
The present invention just open component values to illustrate technical scheme, and, above-mentioned row
The numerical value lifted should not constitute the restriction to the invention protection domain.
Meanwhile, if the invention described above discloses or relate to parts or the structure of connection fastened to each other
Part, then, unless otherwise stated, fixing connect it is to be understood that can the releasably company of fixing
Connect (such as using bolt or screw to connect), it is understood that for: non-removable fixing company
Connecing (such as rivet, weld), certainly, connection fastened to each other can also be integral type structure (example
As used, casting technique is integrally formed to be manufactured) replace and (substantially cannot use integrally formed
Except technique).
It addition, being used for applied in arbitrary technical scheme disclosed in the invention described above represents that position is closed
System or term its implication unless otherwise stated of shape include approximating with it, similar or close shape
State or shape.The either component that the present invention provides both can be by multiple single ingredient groups
Dress forms, it is also possible to the separate part that the technique that is one of the forming manufactures.
Finally should be noted that: above example only in order to technical scheme to be described rather than
It is limited；Although the present invention being described in detail with reference to preferred embodiment, affiliated neck
The those of ordinary skill in territory is it is understood that still can carry out the detailed description of the invention of the present invention
Revise or portion of techniques feature is carried out equivalent；Without deviating from technical solution of the present invention
Spirit, it all should be contained in the middle of the technical scheme scope that the present invention is claimed.
Claims (3)
1. a cushioning device for luffing cylinder, it is characterised in that: described buffer unit includes first
Solenoid directional control valve and accumulator, the oil-in of the first solenoid directional control valve connects with the rodless cavity of amplitude oil cylinder
Connecing, the oil-out of the first solenoid directional control valve is connected with accumulator, when being under hoisting operation pattern,
First solenoid directional control valve of buffer unit is in zero-bit, thus by fluid in accumulator and amplitude oil cylinder
Rodless cavity in fluid cut off, pass through without fluid between accumulator and the rodless cavity of amplitude oil cylinder；When
When being under traveling work pattern, the first solenoid directional control valve commutation of buffer unit, thus by accumulation of energy
In device, fluid connects with fluid in the rodless cavity of amplitude oil cylinder, and accumulator starts oil-filling until reaching
Balance is reached with amplitude oil cylinder oil liquid pressure；Described buffer unit also includes choke valve, the first electromagnetism
Oil-out and the accumulator of reversal valve are connected by choke valve；Described buffer unit uses board-like connection,
First solenoid directional control valve, choke valve and accumulator are integrated on a valve block, with amplitude oil cylinder even
It is connected together；Wherein, described first solenoid directional control valve uses 2/2-way No leakage solenoid directional control valve.
2. a crane, it is characterised in that: described crane includes fuel tank, oil pump, the second electricity
Magnetic reversal valve, balanced valve, amplitude oil cylinder, arm, turntable and the oil of the luffing described in claim 1
Cylinder buffer unit, the oil-in of described oil pump and described fuel tank connect, the oil-out of described oil pump and
The oil-in of described second solenoid directional control valve connects, the actuator port of described second solenoid directional control valve and
The oil-in of balanced valve connects, and the oil return opening of described second solenoid directional control valve and described fuel tank connect,
Two oil-outs of balanced valve connect with the rodless cavity of amplitude oil cylinder and rod chamber respectively, buffer unit
The oil-in of the first solenoid directional control valve is connected with the rodless cavity of amplitude oil cylinder, amplitude oil cylinder, arm,
Turntable connects formation triangular structure two-by-two, wherein, the two ends of amplitude oil cylinder respectively with arm and turning
Table-hinges connects, and the bottom of arm is hinged with turntable, by the position of the flexible change arm of amplitude oil cylinder；
Described crane also includes that overflow valve, described overflow valve are arranged in parallel with oil pump.
Crane the most according to claim 2, it is characterised in that: described crane is for more
Wild wheel-mounted crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310393849.5A CN103407916B (en) | 2013-09-02 | 2013-09-02 | A kind of cushioning device for luffing cylinder and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310393849.5A CN103407916B (en) | 2013-09-02 | 2013-09-02 | A kind of cushioning device for luffing cylinder and crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103407916A CN103407916A (en) | 2013-11-27 |
| CN103407916B true CN103407916B (en) | 2016-08-17 |
Family
ID=49600979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310393849.5A Active CN103407916B (en) | 2013-09-02 | 2013-09-02 | A kind of cushioning device for luffing cylinder and crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103407916B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108016996B (en) * | 2017-11-29 | 2019-01-11 | 宁波伊顿电力科技有限公司 | A kind of substation's loop wheel machine |
| CN108343436A (en) * | 2018-04-13 | 2018-07-31 | 无锡华瀚能源装备科技有限公司 | A kind of digging and anchoring integrated machine of remote control |
| CN110303845A (en) * | 2019-05-31 | 2019-10-08 | 中国北方车辆研究所 | A kind of rocker arm suspension back pressure chamber carrying buffer unit |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997013072A2 (en) * | 1995-09-29 | 1997-04-10 | Beringer Hydraulik Ag | Pressure vibration damping in hydraulic systems |
| JP4005186B2 (en) * | 1997-09-24 | 2007-11-07 | 株式会社加藤製作所 | Suspension mechanism of self-propelled crane |
| JP3394015B2 (en) * | 2000-01-06 | 2003-04-07 | 豊興工業株式会社 | Hydraulic damper for vibration control |
| CN201670154U (en) * | 2010-05-06 | 2010-12-15 | 郑州宇通重工有限公司 | Cushioning device for luffing cylinder of crane jib |
| CN202595778U (en) * | 2012-06-15 | 2012-12-12 | 江苏柳工机械有限公司 | Skid-steer loader movable arm vibration reduction device |
| CN102700606B (en) * | 2012-06-18 | 2014-08-13 | 徐州重型机械有限公司 | Crane and wheel steering switching device thereof |
| CN202833424U (en) * | 2012-08-08 | 2013-03-27 | 湖南瑞龙重工科技有限公司 | Buffer device of hydrocylinder |
| CN102758812A (en) * | 2012-08-08 | 2012-10-31 | 湖南瑞龙重工科技有限公司 | Buffer device of hydraulic oil cylinder |
| CN202789788U (en) * | 2012-09-05 | 2013-03-13 | 德瑞斯博海机械设备（大连）有限公司 | External terminal buffer device for amplitude-variable hydraulic cylinder of marine crane |
| CN103216496A (en) * | 2013-04-25 | 2013-07-24 | 长沙理工大学 | Arm support dynamic load protective method with elastic buffer containing cavity arranged on balance valve |
| CN203428821U (en) * | 2013-09-02 | 2014-02-12 | 徐州重型机械有限公司 | Variable-amplitude cylinder buffer device and crane |
-
2013
- 2013-09-02 CN CN201310393849.5A patent/CN103407916B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103407916A (en) | 2013-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102039791B (en) | Vehicle body dip angle adjusting unit, oil gas suspension mechanism and mobile crane | |
| CN101618669B (en) | Multi-axle vehicle hydro-pneumatic suspension system and crane | |
| CN112009193B (en) | Anti adjustable oil gas suspension hydraulic system that heels | |
| CN103407916B (en) | A kind of cushioning device for luffing cylinder and crane | |
| CN103243919B (en) | A kind of concrete mixer | |
| US10744841B2 (en) | Hydraulic anti-sway bar disconnect system | |
| CN203428821U (en) | Variable-amplitude cylinder buffer device and crane | |
| CN102923100A (en) | Crane landing leg provided with caterpillar track traveling mechanism and wheel suspension traveling mechanism | |
| CN107284174B (en) | Automatic side-tipping automobile suspension system | |
| CN103879257B (en) | Suspension valve, hydro pneumatic suspension control system and engineering truck | |
| CN201970815U (en) | Construction vehicle and dual-front-axle linkage front suspension system | |
| CN205170223U (en) | Full ground hoist chassis hang hydraulic control system | |
| CN206344652U (en) | A kind of hydro-pneumatic suspension system of achievable active and half active switching control | |
| JP5914389B2 (en) | Suspension device | |
| CN101837716B (en) | Suspension device for mining dump truck | |
| CN110847278B (en) | Loader vibration damper | |
| KR920004521B1 (en) | Means to reduce oscillatory deflection of vehicle | |
| CN201670154U (en) | Cushioning device for luffing cylinder of crane jib | |
| CN205479087U (en) | Shock absorber and have its vehicle | |
| CN204385795U (en) | A kind of land leveller and rear bridge mechanism thereof | |
| CN201472099U (en) | Container lifting vehicle | |
| CN204196647U (en) | Suspension valve, hydro pneumatic suspension control system and engineering truck | |
| CN103481741B (en) | Engineering machinery hydro-pneumatic suspension control device and control method | |
| CN102555724A (en) | Hydraulic damping balanced type swinging axle for loader | |
| CN210161861U (en) | Vehicle with various lifting interconnected suspensions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 221000 Jiangsu city of Xuzhou Province Economic and Technological Development Zone of High Road No. 68 Patentee after: Xuzhou Heavy Machinery Co., Ltd. Address before: 221004 No. 165 Copper Mountain Road, Jiangsu, Xuzhou Patentee before: Xuzhou Heavy Machinery Co., Ltd. |